Last year was Earth's hottest on record, U.S. scientists say

By Irene Klotz CAPE CANAVERAL, Fla. (Reuters) - Last year was Earth's hottest on record in a new sign that people are disrupting the climate by burning fossil fuels that release greenhouse gases to the air, two U.S. government agencies said on Friday. The White House said the studies, by the U.S. space agency NASA and the National Oceanic and Atmospheric Administration, showed a need for action to reduce rising world emissions of greenhouse gases. The records undercut arguments by climate s